【单选题】Don’ t just complain about what’s wrong with it ; suggest some __ways to solve the problem.
【简答题】--I saw Betty go to Grandpa Li's home just now. --Yes. She’s often seen _________ the old man with the housework.. A: help B. to help C. helps D. helped
【判断题】Enthalpy change and heat of reaction are the same concepts.
【判断题】W e can just share life with our friends, but we can ’ t learn something from them.
【单选题】'The girl with whom I was talking just now is the president's daughter. ' ______ me proudly. [ ]
【判断题】项目成本估算具有约束性和控制性,它是一种控制机制。